CBD - ascuțit
CBE - obtuz
ABE - alungit
DBE - drept
m (CBE) = m (CBD) + m (DBE) = 35⚬ 15’ + 90⚬ = 125⚬ 15’
m (ABC) = m (ABE) - m (CBE) = 180⚬ - 35⚬ 15’
= 179⚬ 60’ - 35⚬ 15’ = 144⚬ 45’
